+2009-02-28 Eli Zaretskii <eliz@gnu.org>
+
+ * progmodes/grep.el (grep-process-setup) [windows-nt msdos]: Use
+ "--color=always".
+
2009-02-28 Glenn Morris <rgm@gnu.org>
* mail/rmailout.el (rmail-output-as-seen): Add autoload cookie.
;; `--color=auto' emits escape sequences on a tty rather than on a pipe,
;; thus allowing to use multiple grep filters on the command line
;; and to output escape sequences only on the final grep output
- (setenv "GREP_OPTIONS" (concat (getenv "GREP_OPTIONS") " --color=auto"))
+ (setenv "GREP_OPTIONS"
+ (concat (getenv "GREP_OPTIONS")
+ ;; Windows and DOS pipes fail `isatty' detection in Grep.
+ " --color=" (if (memq system-type '(windows-nt ms-dos))
+ "always" "auto")))
;; GREP_COLOR is used in GNU grep 2.5.1, but deprecated in later versions
(setenv "GREP_COLOR" "01;31")
;; GREP_COLORS is used in GNU grep 2.5.2 and later versions